Locating a Capacitor's Outer Foil Using an Oscilloscope

There is a lot of debate about having the outer foil of a capacitor oriented the correct way so as to minimize hum and interference that can affect the amps performance and tonal qualities. I agree that it is probably a best practice to do so but not doing so is not going to kill the amp tone, usually. It might be a little noisier and that CAN be detrimental to your guitar tone.
I bought this used Hitachi V-509 oscilloscope on Craigslist.com for $50 and it has been a useful tool, especially now that many capacitor manufacturers do not mark the outer foil on their caps and if they do, a lot of times, it is incorrect.
You need a scope that goes down to at least 5mV/DIV and I would prefer one with 2mV/DIV but they are usually more expensive. You can barely read some larger capacitance caps with 5mV/DIV.
You can see in the video that most of the new caps I bought were 50/50 on which side was the outer foil lead. The Jupiters seem to be marked correctly as well as the old yellow Astrons that came in the old Fender Tweed amps.
To support my channel, please subscribe and like this video. You can also send a small donation to: paypal.me/Mill...
I also just started my new Patreon page, www.patreon.co...
bitcoin donations: 3QHM7M7WAjy1cxKtH8uiPNwzLVxEdbwhWJ
You can follow me on Facebook, Millstap's KZbin Channel @ / millstap
And Instagram at Millstaps_Jimiisms
@ / millstaps_jimiisms